Properties of Low-Heat Portland Cement Mixed with Pozzolan Cured for Ten Years

摘要：

For the purpose of developing long-term durable material through continuation of long-term hydration, the authors conducted the study of the material containing high-percentage of siliceous pozzolan in the high belite cement (low heat portland cement). This paper reports the hydration characteristics (residual amount of belite and pozzolan, residual amount of Ca(OH)2, and pH of paste) and compressive strength of the material cured for 10 years. A brief summary of the results is shown below. (1) At the age of 10 years, hydration of belite (in cement) and pozzolan is continuing, and strength is also increasing. (2) Though reaction rate varies with pozzolan types (coal gasification slag and fly ash), the hydration rate of the belite and pozzolan becomes low as the pozzolan addition increases. The belite hydration rate varies from about 80％ to 50％. (3) It is expected that, since there is much residue of reactive belite and pozzolan, hydration reaction and increase of compressive strength will continue even in future.

关键词： long-term durability low heat portland cement coal gasification slag fly ash, Ca(OH)2 compressive strength

作者: S. Yamashita M. Sekihiro J.Matui

作者单位: Cement/Concrete Laboratory, Sumitomo Osaka Cement Co., Ltd., Taisho-hi, Osakajapan Cement/Concrete Laboratory, Sumitomo Osaka Cement Co., Ltd., Taisho-hi,Osakajapan Structure Depertment, Abiko Research laboratory, Central Research Institute of Electric Power Indust

会议类型: 国际会议

会议名称: The 7th International Symposium on Cement & Concrete(ISCC2010)、The 11th International Conference on Advance in Concrete Technology and Sustainable Development(第七届水泥与混凝土国际会议暨第11届混凝土技术可持续发展国际会议)

会议地点: 济南

会议语种:英文

页码: 1038-1044

在线出版日期: 2010-05-09（万方平台首次上网日期，不代表论文的发表时间）